Has anyone, other then Newman and Cliff Clavin, ever aspired to grow up and be a Postal worker? it’s a government job with no incentive to do well and no punishment if you don’t. Kind of like communism, it is soulless.
Compare that to UPS and FedEx where employees are rewarded for good performance and fired/run off for poor performance.
I spent a quarter century at the USPS flogging myself to try to perform well. I can say that the internal pressure to perform can be a much more onerous burden than any applied by a supervisor. There are plenty of good Postal employees, both in rank and file and in management, who try to do their best under difficult circumstances.